US Elections are decided when they do redistricting and manipulate the voting districts to ensure the results they want and isn’t a real democracy. The US is run by oligarchs who run their enterprise corporations and the power is concentrated there, not in the government.
The democrats have won most of the elections in the past 30 years and they are still going more and more right. I don’t think you’re correct in this analysis. Hilary Clinton and Al Gore won the elections and didn’t become president, even discounting that the democrats have been in power for the majority of this century and they have only become more and more right wing.